Electrically-welded tube and flange.



T. E. MURRAY.

ELECTRICALLY WELDED TUBE AND FLANGE.

APPLICATION FILED NOV. 29, I916.

1,21 9,1 38. Patented Mar. 13, 1917.

3 mum Wot THOMAS .E. MURRAY, on NEW YORK, n. Y.

ELECTRICALLY-WELDED TUBE AND FLANGE.

Specification of Letters Patent.

Patented Mar. 13, 1917.

Application filed November 29, 1916. Serial No. 134,008.

To all whom it may concern:

Be it known that I, THOMAS E. MURRAY, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented a certain new and useful Improvement in Electrically 'i lelded Tubes and Flanges, of which the following is a specification.

The invention relates to an electrically welded tube and flange, andconsists in the construction of said flange of bent or struck up platemetal, and the provision thereon of an internal shoulder, to which theend of the tube is welded.

The accompanying drawing shows the tube and flange in section, theseparts being held between the electrodes of a welding machine, wherebythe welded joint between the tube and flange is formed.

A is the tube. B generally designates the flange, which is' constructedof bent or struck up plate or sheet metal. Said flange is formed of anannular plate C, an inner reinforcing ring D, which is U-shaped in crosssection and has its edges bearing upon the plate (3, and a covering ringE, substantially of U shape, the edge of the outer wall of which restson said plate C, and said ring being arched to extend partially overring D, the edge of the inner wall of ring E thus forming a'shoulder atF. The tube A flts in the plate C and ring D, and bears at its butt endagainst the shoulder F of ring Theaforesaid parts of the flange areconnectedby bolts, as G, passing through suitable openings. When theflanges of two tubes are to be coupled, the bolts G may be made longenough to pass through said flanges and then be set up by nuts in theusual way.

T make a welded joint between the tube end and the shoulder F, or edgeof the ring E, preferably as follows. with its parts connected, asdescribed, is seated against an electrode H, preferably oi? copper.Electrode H is connected to an an nular plate T by bolts J, said boltsbeing insulated, and said plate and said electrode being insulated fromone another. Outside The flange B- of the plate I is a cover plate K,also secured in. place by said bolts J.

L is an electrode, tubular in form and formed in two half sections, asindicated in dotted lines. Electrode L has a flange M on one end, whichrests upon the'plate I, and a flange N at its opposite end adapted toenter tube A. The outer surface of the tube withinflange B, or the innersurface of said flange, is coated with any fluid insulating material,indicated at '0. After the tube is inserted between electrode N andflange B, a tapered mandrel P, placed in the opening between thesections of electrode N, is driven in, thus expanding said electrode,and causing the tube to be tightly clamped between electrode N andflange B.

The welding cur ent is then established,

thus causing the tube A and ring E to be welded together at the ringedge or shoulder F. i

In this way, I provide on the tube, a flange niade wholly of plate orsheet metal, the parts oflwhich may be bent or struck up separately andafterward bolted together. This flange is extremely strong.

I claim: v

1. A tube, and a hollow flange of plate metal having a shoulder on itsinner periphery; the said tube being received in,

said flange and butt-welded to said shoulder. 2. A tube, a hollow flangeof plate metal having a shoulder on its inner periphery, and areinforcing ringof plate metal within said hollow flange; the saidtubebeing received in said flange and butt-welded to said shoulder.

3:21 tube, a metal ring of substantially U-shaped cross section havingtheedge of its inner wall Welded to the end of said tube and its outerwall extending over the welded joint, an annular plate inolosing saidtube and making face contact with the edge of said outer wall, and meansfor securing together said plate and said ring.

a. A tube, a metal ring of substantially U-shaped cross section havingthe edge of its inner wall welded to the end of said tube and its outerwall extending over-"the welded joint, a metal ring" of U-shaped crosssection seated in said first-named ring"; an annular plate inclosingsaid tube and making face contact With the edge of both Walls of saidinner ring and with the edge of the outer Wall of said outer ring, andmeans for securing together said plate and said rings.

; emma in testimony whereoi I have affixed my

